Fixes mDNS issue; when DHCP IP is present use this for mDNS and not the static fallback IP.

src/service/update_and_run_server_and_frontend.sh

@@ -12,6 +12,25 @@ if ! nmcli -g ipv4.addresses con show "Wired connection 1" 2>/dev/null | grep -q
     sudo nmcli con up "Wired connection 1"
 fi
 
+# Configure Avahi to prefer DHCP address over static fallback for mDNS
+# Get the DHCP-assigned IP (first non-localhost, non-192.168.42.10 IP)
+DHCP_IP=$(ip -4 addr show eth0 2>/dev/null | grep -oP '(?<=inet\s)\d+(\.\d+){3}' | grep -v '^127\.' | grep -v "$(echo $FALLBACK_IP | sed 's/\/24//')" | head -n1)
+HOSTNAME=$(hostname)
+
+if [ -n "$DHCP_IP" ]; then
+    echo "DHCP address detected: $DHCP_IP, configuring Avahi to prefer it for mDNS"
+    # Add entry to /etc/avahi/hosts to explicitly map hostname to DHCP IP
+    sudo mkdir -p /etc/avahi
+    echo "$DHCP_IP $HOSTNAME $HOSTNAME.local" | sudo tee /etc/avahi/hosts > /dev/null
+    # Restart avahi to apply the hosts file
+    sudo systemctl restart avahi-daemon
+else
+    echo "No DHCP address detected, mDNS will use static fallback IP $FALLBACK_IP"
+    # Remove hosts file to let Avahi advertise all IPs
+    sudo rm -f /etc/avahi/hosts
+    sudo systemctl restart avahi-daemon
+fi
+
 # Copy system service file for frontend
 sudo cp /home/caster/bumble-auracast/src/service/auracast-frontend.service /etc/systemd/system/auracast-frontend.service